Combined sill and grate for jigs



A. N. FANNING.

COMBINED SILL AND GRATE FOR JIGS.

APPLICATION FILED DEC. l3. l9l8.

1,3 13,984. Patented Aug. 26,1919.

a. 75. @702 z'rzj ALFRED N. FANNING, OF JOPLIN, MISSOURI.

COMBINED SILL AND GRATE FOR J IGS.

Specification of Letters Patent.

Patented Aug. 26, 1919.

Application filed December 13, 1918. Serial No. 266,624.

To all whom it may. concern:

Be it known that I, ALFRED N. FANNING, a citizen of the United States, residing at Joplin, in the county of Jasper and State of Missouri, have invented certain new and useful Improvements in Combined Sills and Grates for Jigs, of which the following is a specification.

My invention relates to improvements in jigs employed for separating ore from gangue, and has particular reference to the construction of the grate, and supporting sill therefor.

Important objects of the invention are to provide means whereby the sill is permanently secured within the ji so that the lining of the jig is not removed until it is worn out; the grate may be cast much lighter, and

will ofl'er a reduced resistance to the flow of the water therethrough; and the grate is readily removable from the sill, so that a new grate or section thereof may be substituted, in case of injury to the same.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of a combined sill and grate, embodying my invention,

Fig. 2 is a plan view of the sill,

Fig. 3 is a plan view of the combined sill and grate,

Fig. 4 is a plan view of the grate, showing the same removed,

Fig. 5 is a transverse sectional view taken on line 5 5 of Fig. 4;, and,

Fig. 6 is a longitudinal section taken on line 6-6 of Fig. 3.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 designates transversely spaced longitudinal beams of the sill, which are readily connected at their ends by transverse blocks or heads 11, preferably cast integral therewith. The beams 11 are connected between their ends by spaced supports or blocks 12 and 13, preferably formed integral therewith. These blocks or supports project above the beams 10, in the form of tapered extensions 14.. The blocks or heads 11 are provided upon their inner sides, with under-cut recesses or notches 15, having inclined upper walls 16,

and lower horizontal walls 17 in horizontal alinement with the tops of the extensions 14.

The grate is shown as comprising a pair of grate sections 18. Each grate section embodies spaced bars 19, having inclined faces 20, diverging downwardly, as clearly shown in Fig. 5. The outer ends of the grate sections 18 are beveled or inclined, as shown at 21, so that the same will properly fitwithin the recesses or notches 15. The grate sections 18 are placed upon and are supported by the extension 14.

At their inner ends, the grate sections 18 are slightly spaced, and these spaced ends are provided with tapered recesses 22, re ceiving the tapered heads 23, of expanding screws or bolts 24:, operating within screwthreaded openings 25, formed in the central support 18. It will thus be seen that as the screw 25 is screwed down, its tapered head will expand the grate sections 18, moving them longitudinally in opposite directions, whereby they are firmly locked within the recesses 15 and thereby secured to the sill.

In the present illustration, I have shown a pair of grate sections carried by one sill, but the invention is in no sense restricted to this arrangement, as the sill may be made in any suitable width for receiving any suitable number of pairs of grates.

The sills are built into or permanently secured within the frame of the jig, so that the lining of the jig is fitted closely upon the same. The sill being permanent, the lining is not removed until it is worn out or otherwise injured. The grate sections are secured upon the sill, as clearly shown and described. The sand and ore is placed upon the top of the grates, and the water is forced upwardly through the openings in the grate, as is well known. This treatment allows the ore to settle first and pass through the openings of the grate.

It is to be understood that the form of my invention herewith shown and descr bed is to be taken as a preferred example f the same and that various changes in the shape, size, and arrangement of parts may be re sorted to without departing from the spirit of the invention or the scope of the sub j omed claims.

Having thus described my invention, I claim:

1. In apparatus of the character described, the combination with a sill adapted to be connected with the frame of a jig, said sill being provided at its ends with members having notches, a pair of grate sections to be arranged upon the sill with their outer ends projecting into the notches, and expanding means connecting the inner ends of the grate sections with the sill and serving to move the grate sections outwardly.

2. In apparatus of the character described, the combination with a 'sill adapted to be connected with the frame of a jig, said sill being provided at its ends with members projecting above the same and having notches 3. In apparatus of the character described, a sill formed o'lfspaced' longitudinal members and provided at its ends with transverse blocks projecting above the same and having notches formed in their inner sides, spaced supporting members carried by the sill and extending above the same, a pair of grate sections arranged upon the sup porting members with their outer ends projecting into the notches, said grate sections having their inner ends spaced and a provided with tapered recesses, screws engaging the central supporting member and having a tapered head arranged between the innor ends of'the grate sections and disposed within the tapered recesses.

In testimony whereof I aifix my signature.

ALFRED N. FANNING.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

